jdk8-mips64-public/hotspot: src/share/vm/utilities/exceptions.cpp@66c5dadb4d61 (annotated)

src/share/vm/utilities/exceptions.cpp@66c5dadb4d61 (annotated)

src/share/vm/utilities/exceptions.cpp

Fri, 30 Jul 2010 10:21:15 -0700

author: kvn
date: Fri, 30 Jul 2010 10:21:15 -0700
changeset 2039: 66c5dadb4d61
parent 1907: c18cbe5936b8
child 2222: b6aedd1acdc0
permissions: -rw-r--r--

6973308: Missing zero length check before repne scas in check_klass_subtype_slow_path()
Summary: set Z = 0 (not equal) before repne_scan() to indicate that class was not found when RCX == 0.
Reviewed-by: never, phh

 /*
  * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_exceptions.cpp.incl"
 // Implementation of ThreadShadow
 void check_ThreadShadow() {
   const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception);
   const ByteSize offset2 = Thread::pending_exception_offset();
   if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly");
 }
 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) {
   assert(exception != NULL && exception->is_oop(), "invalid exception oop");
   _pending_exception = exception;
   _exception_file    = file;
   _exception_line    = line;
 }
 void ThreadShadow::clear_pending_exception() {
   if (TraceClearedExceptions) {
     if (_pending_exception != NULL) {
       tty->print_cr("Thread::clear_pending_exception: cleared exception:");
       _pending_exception->print();
     }
   }
   _pending_exception = NULL;
   _exception_file    = NULL;
   _exception_line    = 0;
 }
 // Implementation of Exceptions
 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) {
   // bootstrapping check
   if (!Universe::is_fully_initialized()) {
    vm_exit_during_initialization(h_exception);
    ShouldNotReachHere();
   }
   if (thread->is_VM_thread()
       || thread->is_Compiler_thread() ) {
     // We do not care what kind of exception we get for the vm-thread or a thread which
     // is compiling.  We just install a dummy exception object
     thread->set_pending_exception(Universe::vm_exception(), file, line);
     return true;
   }
   return false;
 }
 bool Exceptions::special_exception(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message) {
   // bootstrapping check
   if (!Universe::is_fully_initialized()) {
     if (h_name.is_null()) {
       // atleast an informative message.
       vm_exit_during_initialization("Exception", message);
     } else {
       vm_exit_during_initialization(h_name, message);
     }
     ShouldNotReachHere();
   }
   if (thread->is_VM_thread()
       || thread->is_Compiler_thread() ) {
     // We do not care what kind of exception we get for the vm-thread or a thread which
     // is compiling.  We just install a dummy exception object
     thread->set_pending_exception(Universe::vm_exception(), file, line);
     return true;
   }
   return false;
 }
 // This method should only be called from generated code,
 // therefore the exception oop should be in the oopmap.
 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) {
   assert(exception != NULL, "exception should not be NULL");
   Handle h_exception = Handle(thread, exception);
   _throw(thread, file, line, h_exception);
 }
 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) {
   assert(h_exception() != NULL, "exception should not be NULL");
   // tracing (do this up front - so it works during boot strapping)
   if (TraceExceptions) {
     ttyLocker ttyl;
     ResourceMark rm;
     tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n"
                   "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT,
                   h_exception->print_value_string(),
                   message ? ": " : "", message ? message : "",
                   (address)h_exception(), file, line, thread);
   }
   // for AbortVMOnException flag
   NOT_PRODUCT(Exceptions::debug_check_abort(h_exception, message));
   // Check for special boot-strapping/vm-thread handling
   if (special_exception(thread, file, line, h_exception)) return;
   assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable");
   // set the pending exception
   thread->set_pending_exception(h_exception(), file, line);
   // vm log
   Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception());
 }
 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_loader, Handle h_protection_domain) {
   // Check for special boot-strapping/vm-thread handling
   if (special_exception(thread, file, line, h_name, message)) return;
   // Create and throw exception
   Handle h_cause(thread, NULL);
   Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain);
   _throw(thread, file, line, h_exception, message);
 }
 // Throw an exception with a message and a cause
 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_cause, Handle h_loader, Handle h_protection_domain) {
   // Check for special boot-strapping/vm-thread handling
   if (special_exception(thread, file, line, h_name, message)) return;
   // Create and throw exception and init cause
   Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain);
   _throw(thread, file, line, h_exception, message);
 }
 // This version creates handles and calls the other version
 void Exceptions::_throw_msg(Thread* thread, const char* file, int line,
                             symbolOop name, const char* message) {
   symbolHandle h_name(thread, name);
   Handle       h_loader(thread, NULL);
   Handle       h_protection_domain(thread, NULL);
   Exceptions::_throw_msg(thread, file, line, h_name, message, h_loader, h_protection_domain);
 }
 // This version already has a handle for name
 void Exceptions::_throw_msg(Thread* thread, const char* file, int line,
                             symbolHandle name, const char* message) {
   Handle       h_loader(thread, NULL);
   Handle       h_protection_domain(thread, NULL);
   Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain);
 }
 // This version already has a handle for name
 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line,
                             symbolHandle name, const char* message, Handle cause) {
   Handle       h_loader(thread, NULL);
   Handle       h_protection_domain(thread, NULL);
   Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain);
 }
 void Exceptions::_throw_args(Thread* thread, const char* file, int line, symbolHandle h_name, symbolHandle h_signature, JavaCallArguments *args) {
   // Check for special boot-strapping/vm-thread handling
   if (special_exception(thread, file, line, h_name, NULL)) return;
   // Create and throw exception
   Handle h_loader(thread, NULL);
   Handle h_prot(thread, NULL);
   Handle h_cause(thread, NULL);
   Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot);
   _throw(thread, file, line, exception);
 }
 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line) {
   Handle exception;
   if (!THREAD->has_pending_exception()) {
     klassOop k = SystemDictionary::StackOverflowError_klass();
     oop e = instanceKlass::cast(k)->allocate_instance(CHECK);
     exception = Handle(THREAD, e);  // fill_in_stack trace does gc
     if (StackTraceInThrowable) {
       java_lang_Throwable::fill_in_stack_trace(exception);
     }
   } else {
     // if prior exception, throw that one instead
     exception = Handle(THREAD, THREAD->pending_exception());
   }
   _throw_oop(THREAD, file, line, exception());
 }
 void Exceptions::fthrow(Thread* thread, const char* file, int line, symbolHandle h_name, const char* format, ...) {
   const int max_msg_size = 1024;
   va_list ap;
   va_start(ap, format);
   char msg[max_msg_size];
   vsnprintf(msg, max_msg_size, format, ap);
   msg[max_msg_size-1] = '\0';
   va_end(ap);
   _throw_msg(thread, file, line, h_name, msg);
 }
 // Creates an exception oop, calls the <init> method with the given signature.
 // and returns a Handle
 // Initializes the cause if cause non-null
 Handle Exceptions::new_exception(Thread *thread, symbolHandle h_name,
                                  symbolHandle signature,
                                  JavaCallArguments *args,
                                  Handle h_cause, Handle h_loader,
                                  Handle h_protection_domain) {
   assert(Universe::is_fully_initialized(),
     "cannot be called during initialization");
   assert(thread->is_Java_thread(), "can only be called by a Java thread");
   assert(!thread->has_pending_exception(), "already has exception");
   Handle h_exception;
   // Resolve exception klass
   klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread);
   instanceKlassHandle klass (thread, ik);
   if (!thread->has_pending_exception()) {
     assert(klass.not_null(), "klass must exist");
     // We are about to create an instance - so make sure that klass is initialized
     klass->initialize(thread);
     if (!thread->has_pending_exception()) {
       // Allocate new exception
       h_exception = klass->allocate_instance_handle(thread);
       if (!thread->has_pending_exception()) {
         JavaValue result(T_VOID);
         args->set_receiver(h_exception);
         // Call constructor
         JavaCalls::call_special(&result, klass,
                                          vmSymbolHandles::object_initializer_name(),
                                          signature,
                                          args,
                                          thread);
       }
     }
     // Future: object initializer should take a cause argument
     if (h_cause() != NULL) {
       assert(h_cause->is_a(SystemDictionary::Throwable_klass()),
           "exception cause is not a subclass of java/lang/Throwable");
       JavaValue result1(T_OBJECT);
       JavaCallArguments args1;
       args1.set_receiver(h_exception);
       args1.push_oop(h_cause);
       JavaCalls::call_virtual(&result1, klass,
                                      vmSymbolHandles::initCause_name(),
                                      vmSymbolHandles::throwable_throwable_signature(),
                                      &args1,
                                      thread);
     }
   }
   // Check if another exception was thrown in the process, if so rethrow that one
   if (thread->has_pending_exception()) {
     h_exception = Handle(thread, thread->pending_exception());
     thread->clear_pending_exception();
   }
   return h_exception;
 }
 // Convenience method. Calls either the <init>() or <init>(String) method when
 // creating a new exception
 Handle Exceptions::new_exception(Thread* thread, symbolHandle h_name,
                                  const char* message, Handle h_cause,
                                  Handle h_loader,
                                  Handle h_protection_domain,
                                  ExceptionMsgToUtf8Mode to_utf8_safe) {
   JavaCallArguments args;
   symbolHandle signature;
   if (message == NULL) {
     signature = vmSymbolHandles::void_method_signature();
   } else {
     // We want to allocate storage, but we can't do that if there's
     // a pending exception, so we preserve any pending exception
     // around the allocation.
     // If we get an exception from the allocation, prefer that to
     // the exception we are trying to build, or the pending exception.
     // This is sort of like what PRESERVE_EXCEPTION_MARK does, except
     // for the preferencing and the early returns.
     Handle incoming_exception (thread, NULL);
     if (thread->has_pending_exception()) {
       incoming_exception = Handle(thread, thread->pending_exception());
       thread->clear_pending_exception();
     }
     Handle msg;
     if (to_utf8_safe == safe_to_utf8) {
       // Make a java UTF8 string.
       msg = java_lang_String::create_from_str(message, thread);
     } else {
       // Make a java string keeping the encoding scheme of the original string.
       msg = java_lang_String::create_from_platform_dependent_str(message, thread);
     }
     if (thread->has_pending_exception()) {
       Handle exception(thread, thread->pending_exception());
       thread->clear_pending_exception();
       return exception;
     }
     if (incoming_exception.not_null()) {
       return incoming_exception;
     }
     args.push_oop(msg);
     signature = vmSymbolHandles::string_void_signature();
   }
   return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain);
 }
 // Another convenience method that creates handles for null class loaders and
 // protection domains and null causes.
 // If the last parameter 'to_utf8_mode' is safe_to_utf8,
 // it means we can safely ignore the encoding scheme of the message string and
 // convert it directly to a java UTF8 string. Otherwise, we need to take the
 // encoding scheme of the string into account. One thing we should do at some
 // point is to push this flag down to class java_lang_String since other
 // classes may need similar functionalities.
 Handle Exceptions::new_exception(Thread* thread,
                                  symbolOop name,
                                  const char* message,
                                  ExceptionMsgToUtf8Mode to_utf8_safe) {
   symbolHandle h_name(thread, name);
   Handle       h_loader(thread, NULL);
   Handle       h_prot(thread, NULL);
   Handle       h_cause(thread, NULL);
   return Exceptions::new_exception(thread, h_name, message, h_cause, h_loader,
                                    h_prot, to_utf8_safe);
 }
 // Implementation of ExceptionMark
 ExceptionMark::ExceptionMark(Thread*& thread) {
   thread     = Thread::current();
   _thread    = thread;
   if (_thread->has_pending_exception()) {
     oop exception = _thread->pending_exception();
     _thread->clear_pending_exception(); // Needed to avoid infinite recursion
     exception->print();
     fatal("ExceptionMark constructor expects no pending exceptions");
   }
 }
 ExceptionMark::~ExceptionMark() {
   if (_thread->has_pending_exception()) {
     Handle exception(_thread, _thread->pending_exception());
     _thread->clear_pending_exception(); // Needed to avoid infinite recursion
     if (is_init_completed()) {
       exception->print();
       fatal("ExceptionMark destructor expects no pending exceptions");
     } else {
       vm_exit_during_initialization(exception);
     }
   }
 }
 // ----------------------------------------------------------------------------------------
 #ifndef PRODUCT
 // caller frees value_string if necessary
 void Exceptions::debug_check_abort(const char *value_string, const char* message) {
   if (AbortVMOnException != NULL && value_string != NULL &&
       strstr(value_string, AbortVMOnException)) {
     if (AbortVMOnExceptionMessage == NULL || message == NULL ||
         strcmp(message, AbortVMOnExceptionMessage) == 0) {
       fatal(err_msg("Saw %s, aborting", value_string));
     }
   }
 }
 void Exceptions::debug_check_abort(Handle exception, const char* message) {
   if (AbortVMOnException != NULL) {
     ResourceMark rm;
     if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) {
       oop msg = java_lang_Throwable::message(exception);
       if (msg != NULL) {
         message = java_lang_String::as_utf8_string(msg);
       }
     }
     debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message);
   }
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/exceptions.cpp@66c5dadb4d61 (annotated)

src/share/vm/utilities/exceptions.cpp